I want the most simple Arduino board with a switch wich allow to select between power regulated input (using jack connector) or a 5V power input using breakout USB connector (5 pins). The purpose of that is to reduce power consumption to its minimum when possible. Any feedback about my project will be very wellcome :-)

I want the most simple Arduino board with a switch wich allow to select between power regulated input (using jack connector) or a 5V power input using breakout USB connector (5 pins). To allow more space at PCB to part, breakout USB connector should be placed at bottom.

The purpose of that is to reduce power consumption to its minimum possible when possible. Any feedback about my project will be very wellcome :-)